Pickling tank lining



W. T. DEAN PICKLING TANK LINING May 2, 1944.

Filed Feb. 15, 1942 2 Sheets-Sheet l INVENTOR W/L L/AM Z DEA May 2, 1944. T D AN I 2,347,891

PICKLING TANK LINING Filed Feb. 15, 1942 2 Sheets-Sheet 2 Zil I Fwn 1 INVENTOR gl/lLL/AM I DEA/V Patented May 2, 1944 UNITED STATES PATENT OFFICES PICKLING TANK LINING William T. Dean, Gary, Ind.

Application February 13, 1942, Serial No. 430,839

1 Claim.

- for such tanks which may comprise part of a new tank construction, or apply to existing tanks. It is to be understood that a pickling tank contains acid pickling liquor which is usually heated and in which steel products are immersed, so as to clean their surfaces. Such tanks have been generally unsatisfactory, and the object in this instance is to provide a new lining construction, particularly adapted for large tanks, which eliminates the objectionable features of the prior art.

Specific examples of the invention are illustrated by the following drawings, in which:

Fig. 1 is a plan view of a pickling tank embodying the invention, and involving a tile construction;

Fig. 2 is an enlarged cross-section taken from the line II- -II in Fig. 1;

Fig. 3 is a rear side view of one of the tiles forming the plane surfaces of the tank's sides and bottom;

Fig. 4 is a partially sectioned edge view of the tile shown in Fig. 3;

Fig. 5 is a partially sectioned edge view of one of the bottom corner tiles having a drain hole for the tank;

Fig. 6 is a front view of this corner tile shown y Fig. 5:

Fig. 7 is an edge view of one of the coping tiles;

Fig. 8 is a bottom view of one of the coping tiles;

Fig. 9 is a view similar to Fig. 1, but showing a modification;

Fig. 10 is an enlarged cross-section taken from the line X-X in Fig. 9;

Fig. 11 is a rear view of one of the tiles forming the plane surfaces of the sides and botto m of the tank shown by Figs. 9 and 10;

Fig. 12 is an edge view of the tile shown by Fig. 11;

Fig. 13 is an edge view of one of the bottom corner tiles of the modified tank;

Fig. ii is a front view of this tile shown by Fig. 13;

Fig. 15 is a tile similar to Fig. 13, but provided with a drain hole for the tank; and

Fig. 16 is an edge view of one of the coping tiles used in the modified tank.

More specifically, the first example of the invention comprises a concrete tank form I, lined with acid-resistant ceramic tiles 2 laid together with thermal expansion spaces 3 therebetween,

jacent the lining face filled with a non-rigid, acid-resistant material 5 liquid-tightly sealing the spaces 3. Such material may consist of a mixture of 20% asphalt and 80% sulphur, and be applied sufllciently hot so it ca be either poured into the grooves 4, or puttied into place. Pouring is considered preferable since this assures complete filling of the grooves 4. Other materials may be used providing the chosen material is adhesive to the tiles and is sufllciently deformable to permit thermal tile movement without rupturing.

Any material such as is mentioned above is inherently characterized by low structure strength, and it cannot be relied upon to structurally support the tiles against falling inwardly from the concrete form I. are used, it is necessary to employ such a material to seal the necessary expansion spaces between the tiles.

In the case of the present invention, the tiles also have other registered peripheral grooves 6 which are considerably larger than the grooves 4, and are spaced therefrom more remotely from the lining face. These grooves 6 are filled with concrete, reinforced with steel bars if desired in accordance with prior art concrete construction teachings, and this provides a rigid material of great strength which structurally supports the tiles against falling inwardly, a very strong integral tile lining thus resulting.

Since the grooves 6 are relatively remote from the lining face, the adjacent tile portions do not receive much of the heat from the heated pickling liquor in the tank, ceramic tile being a poor conductor of heat. Thus, these portions are not greatly subject to thermal expansion, this permitting the use of concrete or other rigid but structurally strong material. The pickling liquor is, of course, completely sealed from this concrete by the material 5. Preferably, the tiles are made wholly as shown, this further decreas ing the transfer of heat to the tile portions surrounding the grooves 6.

The tiles may be made quite large without introducing difficulties, this making the construction particularly applicable to large tanks. The tiles should be suitably shaped to provide the necessary tank contour, and the coping tiles 2a may be provided with sealing material openings 8 communicating with the passageways formed by the grooves 4, this permitting pouring of the material into these passageways. Incidentally, the passageways formed by both the grooves and having registered peripheral grooves 4 ad- 4 and 6 intercommunicate both vertically and At the same time, when tiles horizontally throughout the tank lining, this making pouring of both the materials 5 and I a relatively easy practice, the material 5 being poured after setting of the material 1. One of the bottom tiles may be provided with a drain opening 9 to permit draining of the tank.

It is to be noted that the material 5 is not under any structural stress, it functioning merely as a seal. Should this material locally melt from position, such as might happen due to local overheating of the pickling liquor, it may be 10-- cally patched upon draining of the tank. It is to be understood that the material 5 should not become fluid at normal pickling operating temperatures. Preferably it should have substantially a zero co-efiicient of thermal expansion, this and other desirable characteristics being possessed by the specific material described.

In the case of the second example, the same principles prevail and, therefore, the various parts are similarly numbered wherever possible, and primed for identification purposes. In the case of this example, the peripheral grooves 6 are substituted by undercut parallel grooves 6a formed in the back faces of the tiles opposite the lining face, the tiles in this instance being solid and much thinner than those of the first example. A cement 1' fills and engages these grooves 6a so as to structurally support the tiles as did the concrete 1 in the case of the first example. However, in this instance, the cement 1' functions to bond the tiles to the concrete form which supports the tiles against the pressure of the pickling liquor, the arrangement being integral throughout as contrasted to the first example,

wherein the lining rested in the concrete tank' material 5' of this function.

IcIaim: A pickling tank lining comprising a plurality of acid-resistant tiles laid together with thermal expansion spaces therebetween and having registered peripheral grooves adjacent the lining face filled with non-rigid acid-resistant material liquid-tightly sealing said spaces and with anchoring portions spaced from said grooves remotely from the lining face which are rigidly engaged by rigid material structurally supporting said'tiles, said non-rigid material comprising a cement having little structural strength but being adhesive to said tiles and sufficiently deformable to permit thermal tile movement without rupturing, and said rigid material comprising a concrete of greater structural strength but lacking in said adhesiveness and deformability.

WILLIAM T. DEAN 

